Abstract: There is disclosed an optical element having a pattern of raised optical elements integral with a surface thereof, and a metal coating selectively covering the surface intermediate the optical elements to form a mask optically isolating the elements. Several methods of producing such metal coating are disclosed that employ conventional photoresist materials and means of applying and removing such materials. Also, a modified element, that is adapted to use in a liquid crystal display device, and methods of producing such modified element are disclosed.

Abstract: An optical apparatus for focusing at least one image and optionally only one image of an object, said apparatus comprising a receiving surface and an optical imaging device between the image and the object to form an image of the object on the receiving surface. The imaging device comprising at least one glass body, at least a portion of which is a photonucleated opacified glass. The body has opposed surfaces, at least one of the surfaces having raised light focusing transparent optical pattern portions integral therewith and transparent channels connecting the raised transparent pattern portions to the surface opposed to the surface containing the pattern.

Abstract: This invention is directed to the making of an electrode assembly which comprises providing anode electrodes on one surface of a photosensitive glass plate, providing cathode electrodes on the opposite surface of said glass plate oriented transversely to said anode electrodes, and dissolving away the plate material in alignment with said anode electrodes forming slots extending between the surfaces of said plate, thereby placing said anode and cathode electrodes in operative relation with each other.